I don't mean swear words, just everyday words that have an effect if used.
Around here I have to be called Mummy or people use endearments if they don't feel comfortable doing that. As soon as Tink hears someone say "Claire" she will say "Claaaaire, Claaaaire" over and over. If she is calling me and I don't respond quick enough she yells "CLAIRE!"
Another word we don't use is "dirty". She has OCD!!! She's 20 months old and for awhile (before Christmas, I can't remember how long exactly) has panicked about dirt. If she drops food she gets upset, she's trying to potty train and if she has an accident she freaks out (which is great cause I give her a real nappy and she just cleans it up, no, I don't mean that...) If I tell her something is dirty she really gets upset so I have to really restrict my use of that word to when I really don't want her to do something. I don't understand it because we are not the tidiest of people, although I do try to keep the place reasonable. Mum is very clean and my BIL is OCD but she's not around Mum or my sister enough to have that rub off on her.